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Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
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Dual-Induced Directed Deposition Mechanism Based on Anionic Surfactants Enables Long Cycle Aqueous Zinc Ion Batteries
Bing Wu1, Tiantian Lu2,3, Xiang Bai2
1Emergency Research Institute, Chinese Institute of Coal Science (CICS), Beijing, 100013, China.
Small Methods
|January 28, 2025
Summary
Researchers developed a new method for aqueous zinc-ion batteries using a surfactant to promote uniform zinc deposition on the Zn (002) plane. This significantly improves cycling life, overcoming dendritic growth issues for better battery performance.
Area of Science:
- Electrochemistry
- Materials Science
Background:
- Aqueous zinc-ion batteries (AZIBs) offer a low-cost, eco-friendly alternative for energy storage.
- Key challenges include limited cycling life due to dendritic zinc (Zn) growth and side reactions.
- The Zn (002) crystal plane shows promise for enhanced anti-corrosion and horizontal growth.
Purpose of the Study:
- To address the challenge of uniform Zn deposition on the Zn (002) plane in AZIBs.
- To improve the cycling life and stability of Zn metal anodes.
- To leverage the unique properties of the Zn (002) plane for battery applications.
Main Methods:
- Utilized an anionic surfactant, 2-acrylamido-2-methylpropanesulfonic acid (AMPS), to induce preferential Zn deposition.
- Investigated the adsorption behavior of AMPS on different Zn crystal planes (Zn (100), Zn (101), Zn (002)).
- Analyzed the role of AMPS's amide groups in facilitating ion transport and uniform Zn plating.
Main Results:
- AMPS preferentially adsorbs on Zn (100) and Zn (101) planes, exposing the Zn (002) plane for nucleation.
- Amide groups in AMPS create fast ion channels, promoting rapid and uniform Zn deposition.
- Symmetric cells with 30 µm Zn foils demonstrated stable plating-stripping over 5000 hours.
Conclusions:
- The dual-induced deposition effect of AMPS enables controlled growth on the Zn (002) plane.
- This strategy significantly enhances the cycling stability and lifespan of Zn metal anodes in AZIBs.
- Achieved ultralong cycle life for aqueous zinc-ion batteries, paving the way for practical applications.
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